Cam lock slider



May 20, 1958 G. s. MALcoLM CAM Locx SLIDER Filed June 8. 1958 IN V ENTOR.

GEORGE s. Macau g? 2 /zrmk/vfy Uni CAM -IJOCK SLIDER George S. Malcolm,Harmonsburg, Pat, `assignor :to Talon, Inc., a corporation ofPennsylvania Application June 8, 1953, Serial No. 360,280 tclai'ms.(crm-205.14)

rlhis inventionrelates to slide fastenersand, particularl'yzto a new'and improved slider therefor of .thextype'illustratedand described inthe United. States: Letters Patent tofCarlile, No. 2,277,818; issuedMarchl, 1942.

`andl 'frictionally locks `the slider against` unintentional'movement'ina manner well knownto Ith'oses-,skilled'cin the zart.

In. sliders of this type of construction, usually :this loclsing. tongue;portion extend's.` abovel` the .slider 'btorlytat leastiin one-position of the pullitab member; i. e., when thezpull tab :is :disposedin .its extreme. unlocked position. When=the locking tongue is in'positioned :intsuch position -above the. slider. body, it will .bevseen thatlit=is `;exposetl to :any destructiveforce to=whchtheasliderfmay 'b'e sub:- jected, such as that encountered in apressirrg. operation. That is, .the .locking tongue 'is liable' tobe'bentzinwardly whenwpressure is applied toittherebymalcing:the-;slider .noalonger functionable as a lock slider.4It is:1:to:'azslider having 'means incorporatedtherewith;for'i'protectingthis `yieldable locking tongueporton :fromibendingran'd :damvagewhen pressure israpplied tonit'thatwthepresent:in-Venti'on relates.

Accordingly, it isfthe general object of the. present'f'invention toprovide a new and improved lockzsliderffor slideffasteners of the typedisclosed intheaforementioned patent having a Safetyfeature'incorporatedto prevent 'damage to the locking portion vwhen .theslider is'subiected toiexcessive pressure such as bypressing.

his-another object of this'inventon to providean improved locksliderwhich .is simple :and :inexpen'sivefin its` constructon and, at the sametime, Aa `slidenhaving--increased strength over prio-r looking-pulltab'zmembersof thefsame generaltype without in any 'waydecreasingi theefiicient locking operation thereof.

Various other objects andadvantagesofrthis invent-ion will be morevapparent` in the course of` thefollowing specification, and will be`particularly pointed out in theappended 'claims.

In the `accompanyingd1'awings,xthe1'e,.is .shown for the purpose ofillustration,` an embodiment which my .in-`

vention may assume in'practice.

In .these drawings:

Fig. 1 is a-perspective view of 'thelimproved lock slider of thepresentinvention showing the pullfitab'in locked position;

Fig. 2'is a perspective view similar `to Fig. l" showing the pull tab inits unlocked position;

Fig. 3 is aisectional view taken on line -3-3 of Fig. 1

i with a'fragmentary view of'a portion of a fastenerl'added;

e States Patent O 4=is a. zsectional view 'takenonrline' 41-4 zofFig. 2;

Big. 5. issa perspective view' of :the slider body 'inxaccordance with:the :present invention; and

Fig.: 6` is .avperspectiveview of :the pulltab member;

Referring'more.particularly. to the drawings,v theimprovednslider` ofthe vpresent invention:con1prises.-apair of :spaced-'apart :overlying-Wing :portons 22and:3.:integra1ly connecteditogethe'r at one :endby aneckA portion'4'aand havingL marginalfiangeportions r5 so as to providesubstantially a Y-shaped channel 6between the. wingiportions.`.It'will'beunderstod that such a slider. isassembled fon the. stringersof a conventional :slide 4fastener (notzshown) 'forlongitudinalimovement thereby. for engaging :and disengaging :the'fastener elementsthereof`V in aimann'erwell:known'tothose sldlledin'theart.

According to the present invention; there .is arrangediin the upper Wingportion21centra'lly thereofarectangular- -shapedaperture 7 whichcommunicates with the slider channel '6th'erein. There is arranged atopposite sides oflthis aperture 7,.a pair of upwardly extendingspacedapart: lugs 81 which are ntegrally connected together at the .top'thereofI by a` transversely` extending bar-like portionr9 which.bridges theaperture '7:'substantially centrally thereof. These lugs 8and the barlikeiportion-lare .preferablyvstruck up zfrom the material ofvthe wing l2 so .thatthey all overlie=the aperture t7i'ltherein.

Thereisprovided apullltab member 1'0 consistng of az plate-like bodymember having an arcuated` yieldable 'tongue-like looking cam portion 12arranged centrally "slider'b'ody 'by-means of the 'trunnion portions13-whch are *loose'ly land pivotally disposed in -undertthe respectivelugs 8. In such position, it will be seen lthat'the-tongue- 'likelockingportion 12is-disposed directly oppositeethe transverse bar-likeportion 9 'extending between the lugs 8. lt'wilalsofbe seen thatthefcenters of the arcuated tonguelike locking portion 12 and thebar-'liketransverse con- -necting portion-9 and the pivotal aXes of the trunnionportionssl 1 are all disposed in substantially the Vsame plane, as'shown atlineA-A inFig. `4 of'th'e drawings.

In; one'position of the pull tab 10, that is, when-the pull'tab isdisposed in its extreme unlocked or upward position, as=shown in Figs. 2and 4, the tongue-like-'lock- Vingportion 12` thereof overlies and isdisposed directly next to 'and-around this bar-like connectingportion.It will'be understood that it is the purpose of thistransverse.bar-likeconnecting portion 9 to lend'support to'the tongue-likeportion12 when the pull tab is disposed in 'suchpositioml so as to preventitfrom'becoming deformed `when-eacessve-pressure isapplied to thelocking'tongue and `slider such as occurs in a pressing operation. Inotherwords, this bar-like portion supports this tonguelike portion1`2`and1prevents it being bent downwardly between the lugs 8' when forceis applied thereto so as ;to avoid the'-dan-gerV of destroying'of thelocking feature 'off the slider.

When it is desired to lock the slider, it will be understood` that thepull tab 10 is manually operated and moved 'about its-pivotal connectionWith the lugs 8 to a downward'position substantially parallel to theslider wings, as'shown in Figs. 1 and 3, -whereby the lockingtongue-'like-portion 12` is moved around to' the undersideof the bar-like`p.0rtion*9 between the lugs Sand passes into and throughthe aperture 7and'into engagement with the fastener elements in the channel of theslider so as to lock the same against unintentional movement along thefastener in a well known manner.

As a result of my invention, it will be seen that there is provided anew .and novel lock slider for slide fasteners which is strong andrugged in its construction having an extremely high resistance to damageby pressing because of the safety feature of the transverse bar-like lugconnecting portion 9. By providing such a construction, it Will be seenthat the strength of the slider is substantially increased over priorlocking pull tab members of the same general type without materiallyincreasing the cost of manufacture thereof.

While I have shown and described one embodiment which my invention mayassume in practice, it will be understood that this embodiment is merelyfor the purpose of illustration .and description, and that other formsmay be devised within the scope of my invention as defined in theappended claims.

What I claim as my invention is:

1. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so .as to provide substantially a Y-shaped fastener elementguide channel therebetween, one of said wings having an aperturethereing substantially centrallythereof, a pair of pull tab retaininglugs arranged at opposite sides of said aperture laterally thereof, alocking pull tab member hingedly connected to said slider bodycomprising a plate-like member having a locking portion at one endadapted to project through said aperture into said channel and a pair ofopposed trunnion portions extending inwardly and transversely anddisposed beneath said lugs, and transversely extending means arrangedintegral with said lugs and bridging said aperture at .a point directlyopposite said locking portion, said locking portion positioned betweensaid trunnion portions and being offset therefrom and adapted in oneposition of said pull member to extend around said transverselyextending means whereby said locking portion is adapted to be supportedand protected against destructive deformation upon application ofdestructive pressure to said locking portion and said pull tab.

2. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped fastener element guidechannel therebetween, one of said wings having an aperture thereinsubstantially centrally thereof, a pair of pull tab retaining lugsarranged at opposite sides of said aperture laterally thereof, a lockingpull tab member hingedly connected to said slider body comprising aplate-like member having a locking portion at one end adapted to projectthrough said aperture into said channel and a pair of opposed trunnionportions extending inwardly and transversely and disposed beneath saidlugs, and a bar-like portion extending transversely between said lugsintegrally connecting them together centrally thereof so as to bridgesaid aperture at a point directly opposite said locking portion, saidlocking portion positioned between said trunnion portions and beingoffset therefrom and adapted in one position of said pull member toextend around said transversely extending bar-like portion whereby saidlocking portion is adapted to be supported and protected againstdestructive deformation upon application of destructive pressure to saidlocking portion and 'said pull tab.

3. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped fastener element guidechannel therebetween, one of said wings having an aperture thereinsubstantially centrally thereof, a pair of full tab retaining lugsarranged at opposite sides of said aperture laterally thereof, a lockingpull tab member hingedly con- 4 nected to Said slider body comprising aplate-like member having an arcuated yieldable locking tongue-likeportion at one end adapted to project through said aperture into saidchannel and a pair of opposed trunnion portions extending inwardly andtransversely and disposed beneath said lugs, and transversely extendingmeans arranged integral with said lugs and bridging said aperture at apoint directly opposite said tongue-like locking portion, saidtongue-like locking portion positioned between said trunnion portionsand being offset therefrom and adapted in one position of said pullmember to extend around said transversely extending means whereby saidlocking portion is adapted to be supported and protected againstdestructive deformation upon application of destructive pressure to saidlocking portion and said pull tab.

4. In a slider' for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped fastener element guidechannel therebetween, one of said wings having an aperture thereinsubstantially centrally thereof, a pair of pull tab retaining lugsarranged at opposite sides of said aperture laterally thereof, .alocking pull tab member hingedly connected to said slider bodycomprising a plate-like member having an arcuated yieldable lockingtongue-like portion at one end thereof adapted to project through saidaperture into said channel 4and a pair of opposed trunnion portionsextending inwardly and transversely therefrom and disposed beneath saidlugs to either side of said locking portion, and a bar-like transverseportion extending between said lugs integrally connecting them togethercentrally thereof so as to bridge said aperture at a point directlyopposite said locking portion, said arcuated tongue-like locking portionpositioned between said trunnion portions and being offset therefrom andbeing disposed and movable around said transverse portion whereby saidlocking portion is adapted to be supported and protected againstdestructive deformation upon application of destructive pressure to saidlocking portion and said pull tab.

5. In a slider for slide fasteners, the combination as defined in claim4, wherein the Centers of the arcuated tongue-like locking portion andthe bar-like transverse connecting portion and the pivotal axes of thetrunnion portions are all disposed in substantially the same plane.

6. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped fastener element guidechannel therebetween, one of said wings having an aperture thereinsubstantially centrally thereof, a pair of pull tab retaining lugsarranged at opposite sides of said aperture laterally thereof, a lockingpull tab member hingedly connected to said slider body comprising aplate-like member having an arcuated yieldable locking tonguelikeportion arranged centrally at one end thereof and disposed out of theplane of the body portion of said tab member and which is adapted to bedisposed in one .position of said tab member in said aperture and extendinto said channel and a pair of opposed trunnion portions extendinginwardly and transversely and disposed beneath said lugs, said trunnionportions disposed substantially in the plane of the body portion of saidtab member to either side of said locking portion, and a bar-liketransverse portion extending between said lugs centrally thereofintegrally connecting them together at the top thereof and bridging saidaperture at a point directly opposite said locking portion, saidarcuated tongue-like portion positioned between said trunnion portionsand being offset therefrom, said arcuated tongue-like locking portionadapted to lie over and substantially next to said transverse portionwhen the pull tab is disposed in its unlocked `position substantiallyparallel to the slider wings whereby said locking portion is adapted tobe supported and protected against destructive deformation by saidtransverse portion upon application of destructive pressure to saidlooking portion and said pull tab.

7. In a slider for slide fasteners, the combination as defined in claim6, wherein the centers of the arcuated tongue-like locking portion andthe bar-like transverse connecting portion and the pivotal axes of thetrunnion portions are all disposed in substantially the same plane.

8. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped channel therebetween,one of said wings having an aperture therein substantially centrallythereof, a pull tab member, a log-like portion including transverselyextending means bridging said aperture, said lug-like portion being opento either side thereof to which said pull tab member is hingedlyconnected to either side of said aperture by means of a pair of opposedtrunnion portions disposed in said openings, and a Cam-like lockingprong carried by said pull tab at one end thereof, said cam-like lockingprong positioned between said trunnion portions and being offsettherefrom, said looking prong disposed around said bridging means andadapted to extend through said aperture into said slider channel whensaid pull tab is disposed in one position and adapted to be disposedover said bridging means on the outer side thereof when said pull tab isdisposed in another position.

9. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide' substantially a Y-shaped channel therebetween,one of said wings having an aperture therein substantially centrallythereof, a pull tab member, a lug-like portion including transverselyextending means bridging said aperture, said lug-like portion being opento either side thereof to which said pull tab member is hingedlyconnected to either side of said aperture by means of a pair of opposedtrunnion portions disposed in said openings, and an arcuated yieldablecam-like locking tongue carried by said pull tab at one end thereofwhich is disposed out of the plane of the body portion of said pull tab,said cam-like locking tongue positioned between said trunnion portionsand being offset therefroin, said looking tongue disposed around saidhridging means and adapted to extend through said vaperture into saidslider channel in under said bridging means when said pull tab isdisposed in one position, and adapted to be disposed over said bridgingmeans on the outer side thereof when said pull tab is disposed inanother position.

10. In a slider for slide fasteners, a slider body comprising a pair ofoverlying spaced-apart Wing portions connected at one end by a neckportion so as to provide substantially a Y-shaped fastener element guidechannel therebetween, one of said wings having an aperture thereingsubstantially centrally thereof, a pair of pull tab retaining lugsarranged at opposite sides of said aperture laterally thereof, a pulltab member having a pair of spaced-apart opposed trunnion portionsarranged at one end thereof, said trunnion portions positioned beneathsaid lugs so as to be hingedly connected to the slider body, anoutwardly extending .arcuated cam-like locking portion carried by saidpull member and positioned between said trunnion portions and out of theplane thereof, and a bar-like portion extending between said lugs andbridging said aperture at a point directly opposite said cam-likelooking portion, said cam-like locking portion adapted to extend intosaid aperture and the slider channel in under the bar-like portion whensaid pull tab is disposed in its loeked position, and adapted to bedisposed over said bar-like portion on the outer side thereof when saidpull tab is disposed in its unlocked position.

References Cted in the file of this patent UNITED STATES PATENTS1,862,196 Norton June 7, 1932 1,915,536 Johnson `Tune 27, 1933 l,936,095Nicholson Nov. 21, 1933 2,223,279 Carlile Nov. 26, 1940 2,277,818Carlile Mar. 31, 1942 2,322,847 Hartley June 29, 1943

